About "Should high school juniors get up to study if they can't sleep at night?" It involves many considerations such as time management, physical and mental health, and learning efficiency. Senior year of high school
First of all, we need to be clear that sleep is essential for a person's physical and mental health. Adequate sleep helps to restore physical strength, improve concentration and memory, and for high school juniors, it is related to the next day's study efficiency and test scores. Therefore, if you can't sleep at night because of insomnia or other reasons, it may not be wise to force yourself up and study. Doing so may lead to poor energy and concentration the next day, which in turn will affect the learning effect. 
Secondly, we need to consider the issue of learning efficiency. Learning is not just a matter of investing time, but more importantly, putting in the effort and efficiency. If you are not in a good state at night due to insomnia, it is difficult to guarantee the effectiveness of your studies even if you are reluctant to get up to study. On the contrary, if you can maintain a good routine during the day and get enough sleep, you will be able to focus more effectively when studying.
Of course, the third year of high school is a special stage, facing a lot of study pressure and exam pressure. Sometimes, students may have trouble sleeping because of nervousness or anxiety. In this case, you can take some relaxation methods appropriately, such as deep breathing, meditation, listening soft**, etc., to help yourself relax and fall asleep.
In addition, reasonable time management is also very important for high school juniors. If you can't sleep at night because of insomnia, you might as well try to do some relaxing activities, such as reading some relaxing books, listening to **, watching movies, etc., to relax your mind. Wait until your condition improves before continuing to study, which can not only ensure physical and mental health, but also improve learning efficiency.
To sum up, when high school juniors can't sleep at night, whether they should get up to study needs to be judged on a case-by-case basis. If you are not in a good state, forcing yourself to study can be counterproductive and affect the learning effect of the next day.